<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <script>
    class Person {
      constructor(name, age) {
        this.name = name
        this.age = age
      }

      do = function () {
        console.log("do");
      }

      adress = "尚硅谷"

      call() {
        console.log("call");
      }
      static say = "shanguigu"
    }

    class Student extends Person {
      constructor(id, name, age) {
        super(name, age)
        this.id = id
      }
    }

    const re = new Student(12, "xiaoA", 23)
    console.log(re);
  </script>
</body>

</html>